Variables and HTML Forms

[J20gU3]

Currently I have the following script:-

function validate_form(){
    if(regform.reguser.value == ""){
	  alert("Please completed the selected box");
	  regform.reguser.focus();
	  return false;  
    }else if(regform.regemail.value == ""){
      alert("Please completed the selected box");
	  regform.regemail.focus();
	  return false;
	}else if(regform.regpass1.value == ""){
	  alert("Please completed the selected box");
	  regform.regpass1.focus();
	  return false;
    }else if(regform.regpass2.value == ""){
	  alert("Please completed the selected box");
      regform.regpass2.focus();	  
	  return false;
	}else{	
      return true;
	}
}

to validate a simple registration form, however I initially tried to streamline this function by cycling through an array using a loop to point to various input elements in the HTML page itself. I found that when trying to use a variable in the aforementioned if statements the javascript failed to work i.e.

var test = "reguser";
if(regform.test.value = ""){
}

I know the javascript is looking for the input element "test" instead of "reguser" but is there any way I can force it to look for the contents of the variable.

[glenngv]

regform.elements[test].value

[Old Pedant]

var test = "reguser";
if(regform[test].value = ""){  ... }

EDIT: Oh, man! THREE minutes. I really am slowing down!